. >> yes, he's a very high energy person and i think he does gain energy from feeling like he's consequential in making a difference. >> reporter: despite that, friends of petraeus told me that todayed they were certain dave and holly petraeus would stay together, though, david, there are still many questions. >> martha raddatz, thank you. >>> and now to the timeline. when this fbi investigation began, and new questions tonight about why the white house and congress did not hear of it until much later. here's abc's senior justice correspondent pierre thomas tonight. >> reporter: sources tell abc news jill kelly considered those harassing e-mails a threat not only to herself, but petraeus. after the fbi was contacted, and an investigation uncovered a sordid affair between petraeus and paula broadwell, there were early concerns that the cia director's secure government e-mails could have been hacked. but the probe never turned up evidence of national security being compromised. what it did find, as one source put it, was lots of human drama. key members of congress want to know why didn't they